Pipe-bending apparatus



G. E. BARKER PIPE BENDING APPARATUS June 16, 1925.

Filed March 12 1924 llll llmmmmumi flg IN VEN TOR QZBQTKQ? A TTORNE YSPatented June 16, 1925.

UNITED STATES.

1,542,355 PATENT "OFFICE.

GUY EUGENE BARKER, -or WATER- oo, Iowa;

PIPE-Emotive APPARATUS.

Application filed March 12,1924. Serial No. 698,797. I

ratus, of which the following is a specificar tion.

-My present pipe bendingapparatus, more particularly to a'simple,inexpensive and readily ort1- able apparatus of this character, my jectbeing the provision of a hand device by means of which pipe may be benteasily and quickly at various angles without flattening or pinching thepipe, and a further object is the provision of adevice of this charactercapable of ready adjustment for different angles and having meanswhereby pipe may be quickly engaged and just as readily released.

In the accompanying drawing which illustrates my present invention andforming a part of this specification; s

Figure 1 isa perspective view of the complete device, illustrating itspractical application,

Fig. 2 is atop plan view illustratingthe position of the parts uponinitial engagement with the pipe to be bent,

' Fig. 3 is a top plan view illustrating the position of the parts atthe completion of a ri ht angle ben fig. 4 is a vertical section througha portion of the device taken substantially on the line 4-4 of Fig. :2,A I Fig. 5 is a detail perspective view of the pipe gripping and-bendingsegment,

Fig. (Sis a detail vertical section through the adjustable st0p, takenon the line 6-6 of Fig. 2, and

Fig. 7 is a detail vertical section'through the adjustable roller pipeguide or abutment, taken substantially on the line 77 of Fig. 2.

. Referring now to these figures, my improved apparatus includes a base10 which may in practice be suitably attached to a workbench or othersupport upon which there is horizontally mounted a pair of intermeshinggear members 11 and 12, the latter disposed approximately at the centerof the base-10 for rotation around an upright post or journal 13 andbeing of suitably reater proportions than the gear 11, the Fitter ofwhichis mounted upon an upright invention relates generally to post orjournal 14 and has a polygonal upper extension 15 for the reception of aconformably shaped wrench 16 which with its handle 17 constitutes themeans whereby the gear 11 may be manually rotated and rotative movementin this way conveyed or imparted to the larger or main gearl2.

A pipeengaging and bending segment 18 whose inner curvature at leastconforms to the periphery of the main gear 12, is provided upon.its'inner or concaved face with teeth 19 and 20 located adjacent toopposite ends thereof, to interfit the teeth of the main gear 12. Theouter surface or convex face of the segment 18 presents smalllongitudinal groove 21 for the reception of a pipe 22 to be bent, as inFigs. 1 and 3, the segment having intermediate its ends an angularlyoffset and vertically flanged pipe-gripping extension 23, between theinner surface of the flange of which and the convex face of the segmentjust sufficient room exists for the reception of the pipe 22 with thesegmentin the position shown in Fig. 2 where its said pipe-grippingextension projects therefrom at right angles to the plane in which thepipe is initially inserted for the bending operation.

At one side of the base 10 and at the 0pposite side of the main gear 12with respect to the actuating gear 11, a clamping bolt 24: rises fromthe said base through the longitudinally slotted h0lder25 of a guideroller 26 which in the bending operation forms an abutment for the pipeto be bent, this guide roller 26 being mounted vertically upon a post 27rising from the holder 25.

Atthe other side of the main gear 12 and adjacent to the actuating gear11 a stop member 28, which is lengthwise slotted, as at 29, isadjustably held in place by a screw 2 30 which threads in connectionwith the base 10 as seen particularly in Figs. 2, 3 and 6, this stopmember being engageable by the forward end of the segment 18 withrespect to the direction of its operative movement, so as to adjustablylimit the extent to which the pipe is bent.

' The parts as set in Figs. 1 and 2 are for a right'angle bend of thepipe 22 and after the segment 18 is set in the position of Fig. 2 withits pipe-gripping extension 23 adjacent to the guide roller 26, it isfree to receive the pipe 22 between its outer face at one end of itsgroove 21 and its vertically flanged gripping extension 23, thepipebeing disposed against the inner face of the guide roller 26. Bythen rotating the actuating gear '11 clockwise by means of the wrench 16and handle 17, counter-clockwise movement is imparted to the main .gear12, and as this movement progressesthe pipe will be gripped by theextension 23 and the bending operation will start, as in Fig. 1,the pipebeing carried lengthwise with the bending segment. During this movement,the roller 26 forms an abutment to prevent the pipe from swinging 01f ofthe base 10 although at the same time it permits the pipe to readilymove lengthwise. As the bend ing operation continues, the pipe will bebent to the desired point and if a right angle bend is desiredthe stop28 is set as in 3 so that when engaged by the forward end of the segment18, as shown in this figure, a true right angular bend will be formed inthe pipe 22." It is then only necessary to rotate the parts in a reversedirection until the original position of Fi 2 has been reached when theproperly bent pipe may be easily lifted out of the machine, it being.obvious that in this latter movement for the purpose of freeing thepipe, the pipe is at liberty to swing inwardly away from the guideroller or abutment 26. It is, furthermore, obvious that by adjusting theguide roller or abutment 26, as well as the stop member 28, the degreeof curvature or bend of the pipe may be readily controlled, and it islikewise obvious that in its bending, pinching or flattening of the pipewill be avoided owing to the uniform even engagement of the bendingsegment with the work, and the gradual fi'exure of the work during thebending operation. a

My invention thus provides a machine of the type specified which issimple, strong and durable, which permits of effective operation anduniform results, and which is not only inexpensive in the firstinstance, but with ordinary care will operate thereafter withoutexpense. K

It is also obvious that in view ofthe manner of engaging and supportingthe segment in connection with the main gear, segments of differentshapes and sizes may be employed, depending uponv the size and characterof the pipe to be bent as well as the particular shape of the benddesired, and that a variety of such segments are adapted for readyinterchangeable association with the main gear in the manner specified.

I claim:

1. A device for manually bending pipe consisting of a main gear and anactuating gear in intermeshing relation, the latter having meansproviding for its manual rotation, apipe bending segment associated withand conforming to the peripheral curvature of the main gear and havingteeth upon its inner face engageable with the. teeth of said gear atspaced points of the latter, a pipegripping member carried by saidsegment, and a pipe guide adjacent to the main gear forming an abutmentfor the pipe during the bending operation.

2. A pipe-bending machine consisting of a support, a gear mounted torotate fiatwise on the support, an actuator for said gear, an externallygrooved and internally toothed bending segment detachably in associationwith said gear having a pipe-gripping element, a pipe-engaging abutmentmounted on said support adjacent to one side of the gear, and a stopmember on the support approximately diametrically opposite to saidabutment for engagement by the forward end of the segment in itsrotation with the gear.

3. A pipe-bending machine consisting of a support, a gear mounted torotate flatwise on the support, an actuator for said gear, an externallygrooved and internally toothed bending segment detachably in associationwith saidgear having a fipe-gripping element, a pipe-engaging abutmentmounted on said supportadjacent to one side of the gear, a stop memberon the support approximately diametrically opposite to said abutment forengagement by the forward end of the segment in its rotation with thegear, the said abutment and said stop member being adjustable on thesupport, for the purpose described.

GUY EUGENE BARKER.

